Irene R. answered 01/09/20
BS in Mechanical Engineering and Certified math teacher for 13 years
The percent increase can be determined by subtracting the two prices and dividing by the original price. This amount is then multiplied by 100.
15 - 12 * 100 = 3 * 100 = 0.25 * 100 = 25 %
12 12
So the percent increase is 25%
If you think about your result, 25% is equal to one 1/4 . One fourth of $12 is $3 and that is the amount of the price increase.